Piano-stool



'(No Model Q J. w. MoDONOUGH.

PIANO STOOL.

' No. 245,003=-.. Patented Aug. 2,1881.

Witnesses. lnylz en-tor UNITED STATES PATENT OFFICE.

JAMES W. MCDO NOUGH, OF CHICAGO, ILLINOIS.

PIANO-STOOL.

SPECIFICATION formingpart of Letters Patent No. 245,003, dated August 2, 1881,

Application filed December 14, 1880. (No model.)

To all whom it may concern Be it known that I, J AMES W. MGDONOUGH,

of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Piano-Stools and I hereby declare the following to be a full, clear, and exact description thereof, which will enable others skilled in the art to which my invention relates to make and use the same, reference being had to the accom pan yin g drawings, formin g a part hereof, and in which Figure 1 represents a side elevation of the same. Fig. 2 represents a plan view of the shaft or bar to which the spring-back is attached, and-the spring catch-lever, and rack into which the said lever works, the upper part of the back being removed. Fig. 3 represents a front view of the shaft, to which the springback is attached and the spring catch-lever attached thereto, and the rack into which the said lever works with its teeth.

Like letters of reference indicate like parts.

My invention relates to that class of pianostools provided with adjustable and yielding backs; and my invention consists in the construction and combination of the several parts, as herein after more fully described and claimed.

In the drawings, A represents the baseof the stool, which is provided with the usual rotary seat, a, and to the under and rear side of which seat are attached lugs 12, provided with openings within which work the ends 0 of a bar or rock-shaft, 9. To one end of the rockshaft is attached, or preferably'cast with it, a lever-arm, cl, provided at its outer end with teeth h, one or more, and a knob or handle, f.

- The lever-arm d is so formed as to extend forward under the seata at right angles, or nearly so, to the bar 9, as shown in Figs. 1 and 2. To

the bottom of the seat a, and at a point opposite the front end of the lever-arm d, and so as to engage with the teeth h of thelever-arm, is firmly attached a rack, 0.

Into the rear side of the bar or rock-shaft g is securely fastened one end of one or more metal springs, 1', preferably a series of springrods bent in the form of a segment of a circle, to give room for the wearing-apparel of the occupant of the stool, and the other end of said spring or springs is securely attached to the back j. r

The operation of my improved piano-stool is as follows: If the occupant of the stool finds that the back j is not properly adjusted to give the desired or most agreeable support, the teeth hot the lever-arm d are released from the rack e by springing the arm 01 outward from the rack e by means of the knob or handlef, and then raised or lowered, which will cause the back j of the stool to press the back of the occupant with more or less force, as may be desired, and the teeth h of the lever-arm d will by the action of the spring of the leverarm enter the notches of the rack and hold the back j. in the desired position.

Having thus explained my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a piano-stool, the combination, with the seat a, provided with the rack e and lugs or bearings b, of the rock-shaft 9, provided with the lever-arm-d, bearing teeth h, curved springs z, and back j, all constructed and arranged to operate substantially as shown and described.

JAMES W. MODONOUGH.

Witnesses:

WM. ZIMMERMAN, N. GoWLEs. 

